You seem to have problems to spot the difference between hiragana 'ra' and 'chi'. Notice that in ち (chi) the horizontal stroke at the top goes through the vertical stroke, where in ら (ra) it doesn't. ツ・シ and ソ・ン are difficult for everybody. There's a trick to remembering the difference: It's always the letter which is written in the same 'direction' as the hiragana one. Notice for example that in シ, it goes top-left (first stroke), middle-left (second stroke) and bottom-left to top-right (third stroke); hiragana し goes the same way from top-left to bottom-left to the right. ツ on the other hand, goes top-left, top-middle, top-right to bottom-left, just as in つ.